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      Knowledge is Power

      Scientific American January 13, 1912

      An Improved Method of Chippinǵ Trees in Turpentine Orchards

      • January 13, 1912

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      More in the January 13, 1912 issue of Scientific American
      • Insects which Devour Metal
      • Reindeer Proǵress in Alaska
      • The Perpetual Calendar-Its Reproduction as a Lost Art
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